The GLDAS elevation field is based on the GTOPO30 Global 30 Arc Second (~1km) Elevation Dataset. The GTOPO elevation was averaged up to the GLDAS resolutions at 0.25 degree and 1 degree. The meteorological forcing fields (i.e. temperature, pressure, humidity and longwave radiation) are adjusted for differences in the GLDAS elevation and respective model terrain height, following Cosgrove et al. (2003).